Merge branch 'release/v0.2.0'v0.2.0

* release/v0.2.0:
  Condense and solidify documentation
  Use :doautocmd to avoid redundancy
  Correct indenting
  Condense load guard
  Split longish conditional
  Remove unneeded function name
  Replace unneeded regex check

5 files changed, 16 insertions, 20 deletions

diff --git a/README.md b/README.md
index 3f6524a..f168f1d 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,8 @@
 shebang\_change\_filetype.vim
 =============================
 
-This plugin watches the first line of a buffer for the presence of a "shebang",
-beginning with the characters "#!".  If such a line is added or modified,
-filetype detection is re-run.
+This plugin re-runs filetype detection if a shebang `#!` is added or changed in
+the buffer.
 
 License
 -------
diff --git a/VERSION b/VERSION
index 6e8bf73..0ea3a94 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.0
+0.2.0
diff --git a/autoload/shebang_change_filetype.vim b/autoload/shebang_change_filetype.vim
index 081eaf1..447ac2b 100644
--- a/autoload/shebang_change_filetype.vim
+++ b/autoload/shebang_change_filetype.vim
@@ -1,7 +1,8 @@
 " Check whether the first line was changed and looks like a shebang, and if
 " so, re-run filetype detection
-function! shebang_change_filetype#Check() abort
-  if line('''[') == 1 && getline(1) =~# '^#!'
+function! shebang_change_filetype#() abort
+  if line("'[") == 1
+        \ && strpart(getline(1), 0, 2) ==# '#!'
     doautocmd filetypedetect BufRead
   endif
 endfunction
diff --git a/doc/shebang_change_filetype.txt b/doc/shebang_change_filetype.txt
index 0d84d95..d26f02a 100644
--- a/doc/shebang_change_filetype.txt
+++ b/doc/shebang_change_filetype.txt
@@ -1,15 +1,14 @@
-*shebang_change_filetype.txt*	For Vim version 7.0	Last change: 2019 May 20
+*shebang_change_filetype.txt*	For Vim version 7.0	Last change: 2019 May 28
 
 DESCRIPTION				*shebang_change_filetype*
 
-This plugin watches the first line of a buffer for the presence of a
-"shebang", beginning with the characters "#!".  If such a line is added or
-modified, filetype detection is re-run.
+This plugin re-runs |filetype| detection if a shebang `#!` is added or changed
+in the buffer.
 
 REQUIREMENTS				*shebang_change_filetype-requirements*
 
-This plugin only loads if 'compatible' is not set, and requires the |+autocmd|
-feature.  It works best if the |TextChanged| event is also available.
+This plugin only loads if 'compatible' is not set.  It works best if the
+|TextChanged| event is supported.
 
 AUTHOR					*shebang_change_filetype-author*
 
diff --git a/plugin/shebang_change_filetype.vim b/plugin/shebang_change_filetype.vim
index ca6c183..03f5830 100644
--- a/plugin/shebang_change_filetype.vim
+++ b/plugin/shebang_change_filetype.vim
@@ -1,14 +1,11 @@
 "
-" shebang_change_filetype.vim: On leaving insert mode, check whether the first
-" line was changed and looks like a shebang format.
+" shebang_change_filetype.vim: Re-run filetype detection if a shebang #! is
+" added or changed in the buffer.
 "
 " Author: Tom Ryder <tom@sanctum.geek.nz>
 " License: Same as Vim itself
 "
-if exists('loaded_shebang_change_filetype') || &compatible
-  finish
-endif
-if !has('autocmd') || v:version < 700
+if exists('loaded_shebang_change_filetype') || &compatible || v:version < 700
   finish
 endif
 let loaded_shebang_change_filetype = 1
@@ -17,9 +14,9 @@ let loaded_shebang_change_filetype = 1
 augroup shebang_change_filetype
   autocmd!
   autocmd InsertLeave *
-       \ call shebang_change_filetype#Check()
+        \ call shebang_change_filetype#()
   if exists('##TextChanged')
     autocmd TextChanged *
-          \ call shebang_change_filetype#Check()
+          \ doautocmd InsertLeave
   endif
 augroup END