bugfix: command Rbeg (bad working with selection from the function fixed)

Author: augustodamasceno

README.md

@@ -44,7 +44,7 @@ curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
 * English Dictionary completion  
 * Commands  
     * 'ctabs' : convert tabs into 4 spaces  
-    * 'rbeg' \<NUM-CHARS\> \<REPLACE-WITH\> : Replace beginning characters of a selection 
+    * 'Rbeg' \<NUM-CHARS\> \<REPLACE-WITH\> : Replace beginning characters of a selection 
     * Control + b : change buffer files   
     * Control + i : Indent all lines  
     * Control + e : Got to the next error  

vimrc

@@ -32,10 +32,12 @@ noremap <C-b> :bn<CR>
 noremap <C-i> gg=G
 
 """ FUNCTIONS
-function! ReplaceBeginningChars(numChars, replaceWith)
-	    execute ":'<,'>s/^\\.\\{" . a:numChars . "}/" . a:replaceWith . "/"
+function! ReplaceBeginningChars(numChars, newText) range
+	let l:pattern = '^.\{' . a:numChars . '}\ze'
+	execute a:firstline . ',' . a:lastline . 's/' . l:pattern . '/' . a:newText . '/'
 endfunction
-command! -nargs=+ rbeg call ReplaceBeginningChars(<f-args>)
+
+command! -nargs=+ -range=% Rbeg :<line1>,<line2>call ReplaceBeginningChars(<f-args>)
 
 """" Ale Pluging Configuration by Victor Mours (Reference 4 in notes.md)
 nmap <silent> <C-e> <Plug>(ale_next_wrap)