diff --git a/autoload/emmet.vim b/autoload/emmet.vim
index d2def1f..926c88e 100644
--- a/autoload/emmet.vim
+++ b/autoload/emmet.vim
@@ -123,29 +123,30 @@ function! emmet#isExpandable()
 endfunction
 
 function! emmet#mergeConfig(lhs, rhs)
-  if type(a:lhs) == 3 && type(a:rhs) == 3
-    let a:lhs += a:rhs
-    if len(a:lhs)
-      call remove(a:lhs, 0, len(a:lhs)-1)
+  let [lhs, rhs] = [a:lhs, a:rhs]
+  if type(lhs) == 3 && type(rhs) == 3
+    let lhs += rhs
+    if len(lhs)
+      call remove(lhs, 0, len(lhs)-1)
     endif
-    for rhi in a:rhs
-      call add(a:lhs, a:rhs[rhi])
+    for rhi in rhs
+      call add(lhs, rhs[rhi])
     endfor
-  elseif type(a:lhs) == 4 && type(a:rhs) == 4
-    for key in keys(a:rhs)
-      if type(a:rhs[key]) == 3
-        if !has_key(a:lhs, key)
-          let a:lhs[key] = []
+  elseif type(lhs) == 4 && type(rhs) == 4
+    for key in keys(rhs)
+      if type(rhs[key]) == 3
+        if !has_key(lhs, key)
+          let lhs[key] = []
         endif
-        let a:lhs[key] += a:rhs[key]
-      elseif type(a:rhs[key]) == 4
-        if has_key(a:lhs, key)
-          call emmet#mergeConfig(a:lhs[key], a:rhs[key])
+        let lhs[key] += rhs[key]
+      elseif type(rhs[key]) == 4
+        if has_key(lhs, key)
+          call emmet#mergeConfig(lhs[key], rhs[key])
         else
-          let a:lhs[key] = a:rhs[key]
+          let lhs[key] = rhs[key]
         endif
       else
-        let a:lhs[key] = a:rhs[key]
+        let lhs[key] = rhs[key]
       endif
     endfor
   endif
@@ -297,7 +298,6 @@ function! emmet#getResource(type, name, default)
     endif
     for ext in extends
       if has_key(s:emmet_settings, ext) && has_key(s:emmet_settings[ext], a:name)
-        let V = s:emmet_settings[ext][a:name]
         if type(ret) == 3 || type(ret) == 4
           call emmet#mergeConfig(ret, s:emmet_settings[ext][a:name])
         else
@@ -308,7 +308,6 @@ function! emmet#getResource(type, name, default)
   endif
 
   if has_key(s:emmet_settings[a:type], a:name)
-    let v = s:emmet_settings[a:type][a:name]
     if type(ret) == 3 || type(ret) == 4
       call emmet#mergeConfig(ret, s:emmet_settings[a:type][a:name])
     else
@@ -430,7 +429,6 @@ endfunction
 
 function! emmet#expandCursorExpr(expand, mode)
   let expand = a:expand
-  let type = emmet#getFileType()
   if expand !~ '\${cursor}'
     if a:mode == 2
       let expand = '${cursor}' . expand
@@ -479,6 +477,8 @@ function! emmet#expandAbbr(mode, abbr) range
         let spl = emmet#splitFilterArg(filters)
         let fline = getline(a:firstline)
         let query = substitute(query, '>\{0,1}{\$#}\s*$', '{\\$column\\$}*' . len(split(fline, spl)), '')
+      else
+        let spl = ''
       endif
       let items = emmet#parseIntoTree(query, type).child
       for item in items
diff --git a/autoload/emmet/lang/css.vim b/autoload/emmet/lang/css.vim
index 65a544f..249e24d 100644
--- a/autoload/emmet/lang/css.vim
+++ b/autoload/emmet/lang/css.vim
@@ -8,7 +8,6 @@ function! emmet#lang#css#parseIntoTree(abbr, type)
   let prefix = 0
   let value = ''
 
-  let settings = emmet#getSettings()
   let indent = emmet#getIndentation(type)
   let aliases = emmet#getResource(type, 'aliases', {})
   let snippets = emmet#getResource(type, 'snippets', {})
diff --git a/autoload/emmet/lang/haml.vim b/autoload/emmet/lang/haml.vim
index f0c5e88..30be99f 100644
--- a/autoload/emmet/lang/haml.vim
+++ b/autoload/emmet/lang/haml.vim
@@ -18,8 +18,6 @@ function! emmet#lang#haml#toString(settings, current, type, inline, filters, ite
   let attribute_style = emmet#getResource('haml', 'attribute_style', 'hash')
   let str = ""
 
-  let comment_indent = ''
-  let comment = ''
   let current_name = current.name
   if dollar_expr
     let current_name = substitute(current.name, '\$$', itemno+1, '')
@@ -165,8 +163,8 @@ function! emmet#lang#haml#parseTag(tag)
   let current = emmet#newNode()
   let mx = '%\([a-zA-Z][a-zA-Z0-9]*\)\s*\%({\(.*\)}\)'
   let match = matchstr(a:tag, mx)
-  let current.name = substitute(match, mx, '\1', 'i')
-  let attrs = substitute(match, mx, '\2', 'i')
+  let current.name = substitute(match, mx, '\1', '')
+  let attrs = substitute(match, mx, '\2', '')
   let mx = '\([a-zA-Z0-9]\+\)\s*=>\s*\%(\([^"'' \t]\+\)\|"\([^"]\{-}\)"\|''\([^'']\{-}\)''\)'
   while len(attrs) > 0
     let match = matchstr(attrs, mx)
diff --git a/autoload/emmet/lang/html.vim b/autoload/emmet/lang/html.vim
index 0086fa9..a3a029c 100644
--- a/autoload/emmet/lang/html.vim
+++ b/autoload/emmet/lang/html.vim
@@ -402,7 +402,8 @@ function! emmet#lang#html#toString(settings, current, type, inline, filters, ite
     return text
   endif
   if len(current_name) > 0
-  let str .= '<' . current_name
+    let str .= '<' . current_name
+  endif
   for attr in emmet#util#unique(current.attrs_order + keys(current.attr))
     if !has_key(current.attr, attr)
       continue
diff --git a/autoload/emmet/lang/slim.vim b/autoload/emmet/lang/slim.vim
index 8a6967a..f493054 100644
--- a/autoload/emmet/lang/slim.vim
+++ b/autoload/emmet/lang/slim.vim
@@ -7,7 +7,6 @@ function! emmet#lang#slim#parseIntoTree(abbr, type)
 endfunction
 
 function! emmet#lang#slim#toString(settings, current, type, inline, filters, itemno, indent)
-  let settings = a:settings
   let current = a:current
   let type = a:type
   let inline = a:inline
@@ -17,8 +16,6 @@ function! emmet#lang#slim#toString(settings, current, type, inline, filters, ite
   let dollar_expr = emmet#getResource(type, 'dollar_expr', 1)
   let str = ""
 
-  let comment_indent = ''
-  let comment = ''
   let current_name = current.name
   if dollar_expr
     let current_name = substitute(current.name, '\$$', itemno+1, '')
@@ -124,8 +121,8 @@ function! emmet#lang#slim#parseTag(tag)
   let current = emmet#newNode()
   let mx = '\([a-zA-Z][a-zA-Z0-9]*\)\s\+\(.*\)'
   let match = matchstr(a:tag, mx)
-  let current.name = substitute(match, mx, '\1', 'i')
-  let attrs = substitute(match, mx, '\2', 'i')
+  let current.name = substitute(match, mx, '\1', '')
+  let attrs = substitute(match, mx, '\2', '')
   let mx = '\([a-zA-Z0-9]\+\)=\%(\([^"'' \t]\+\)\|"\([^"]\{-}\)"\|''\([^'']\{-}\)''\)'
   while len(attrs) > 0
     let match = matchstr(attrs, mx)
diff --git a/autoload/emmet/util.vim b/autoload/emmet/util.vim
index 296e7af..bd22a38 100644
--- a/autoload/emmet/util.vim
+++ b/autoload/emmet/util.vim
@@ -283,7 +283,6 @@ function! emmet#util#getImageSize(fn)
 endfunction
 
 function! emmet#util#imageSizeWithImageMagick(fn)
-  let fn = a:fn
   let img_info = system('identify -format "%wx%h" "'.a:fn.'"')
   let img_size = split(substitute(img_info, '\n', '', ''), 'x')
   if len(img_size) != 2