Add support for ptop fixer (#3652)

* Add support for `ptop` fixer

* add test file for ptop tests

* called wrong fixer in assertion test

* use ' %s %t' instead of ' %t %t'

autoload/ale/fixers/ptop.vim

@@ -0,0 +1,17 @@
+" Author: BarrOff https://github.com/BarrOff
+" Description: Integration of ptop with ALE.
+
+call ale#Set('pascal_ptop_executable', 'ptop')
+call ale#Set('pascal_ptop_options', '')
+
+function! ale#fixers#ptop#Fix(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'pascal_ptop_executable')
+    let l:options = ale#Var(a:buffer, 'pascal_ptop_options')
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . (empty(l:options) ? '' : ' ' . l:options)
+    \       . ' %s %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction