move textobj_include_function_doc to getter function

autoload/go/config.vim

@@ -338,6 +338,10 @@ function! go#config#GorenamePrefill() abort
           \ ': go#util#camelcase(expand("<cword>"))')
 endfunction
 
+function! go#config#TextobjIncludeFunctionDoc() abort
+  return get(g:, "go_textobj_include_function_doc", 1)
+endfunction
+
 " Set the default value. A value of "1" is a shortcut for this, for
 " compatibility reasons.
 if exists("g:go_gorename_prefill") && g:go_gorename_prefill == 1

autoload/go/textobj.vim

@@ -1,7 +1,3 @@
-if !exists("g:go_textobj_include_function_doc")
-  let g:go_textobj_include_function_doc = 1
-endif
-
 if !exists("g:go_textobj_include_variable")
   let g:go_textobj_include_variable = 1
 endif
@@ -33,7 +29,7 @@ function! go#textobj#Function(mode) abort
   let command = printf("%s -format vim -file %s -offset %s", bin_path, fname, offset)
   let command .= " -mode enclosing"
 
-  if g:go_textobj_include_function_doc
+  if go#config#TextobjIncludeFunctionDoc()
     let command .= " -parse-comments"
   endif
 
@@ -59,7 +55,7 @@ function! go#textobj#Function(mode) abort
   if a:mode == 'a'
     " anonymous functions doesn't have associated doc. Also check if the user
     " want's to include doc comments for function declarations
-    if has_key(info, 'doc') && g:go_textobj_include_function_doc
+    if has_key(info, 'doc') && go#config#TextobjIncludeFunctionDoc()
       call cursor(info.doc.line, info.doc.col)
     elseif info['sig']['name'] == '' && g:go_textobj_include_variable
       " one liner anonymous functions
@@ -121,7 +117,7 @@ function! go#textobj#FunctionLocation(direction, cnt) abort
     let command .= ' -mode prev'
   endif
 
-  if g:go_textobj_include_function_doc
+  if go#config#TextobjIncludeFunctionDoc()
     let command .= " -parse-comments"
   endif
 
@@ -186,7 +182,7 @@ function! go#textobj#FunctionJump(mode, direction) abort
   endif
 
   if a:mode == 'v' && a:direction == 'prev'
-    if has_key(info, 'doc') && g:go_textobj_include_function_doc
+    if has_key(info, 'doc') && go#config#TextobjIncludeFunctionDoc()
       keepjumps call cursor(info.doc.line, 1)
     else
       keepjumps call cursor(info.func.line, 1)