fix variable name (#1)

Author: rhysd

README.md

@@ -49,7 +49,7 @@ Screenshot:
 
 ## More complecated operator-pending mappings
 
-If you set `g:textobj_clang_more_mapping` to `1`, many operator-pending mappings are defined.  As a default, mappings in a below table are defined.  You can control the number of the mappings with `g:textobj_clang_mapping_kinds`.
+If you set `g:textobj_clang_more_mappings` to `1`, many operator-pending mappings are defined.  As a default, mappings in a below table are defined.  You can control the number of the mappings with `g:textobj_clang_mapping_kinds`.
 
 <table>
     <tr>

ftplugin/c/textobj_clang.vim

@@ -5,11 +5,11 @@ endif
 let s:save_cpo = &cpo
 set cpo&vim
 
-let g:textobj_clang_more_mapping = get(g:, 'textobj_clang_more_mappings', 0)
+let g:textobj_clang_more_mappings = get(g:, 'textobj_clang_more_mappings', 0)
 let g:textobj_clang_include_headers = get(g:, 'textobj_clang_include_headers', 0)
 let s:spec = {}
 
-if g:textobj_clang_more_mapping
+if g:textobj_clang_more_mappings
     let g:textobj_clang_mapping_kinds = get(g:, 'textobj_clang_kinds', ['any', 'class', 'function', 'expression', 'statement', 'parameter', 'namespace', 'under_cursor', 'most_inner'])
     for s:name in g:textobj_clang_mapping_kinds
         let s:spec[s:name] = {

ftplugin/cpp/textobj_clang.vim

@@ -5,11 +5,11 @@ endif
 let s:save_cpo = &cpo
 set cpo&vim
 
-let g:textobj_clang_more_mapping = get(g:, 'textobj_clang_more_mappings', 0)
+let g:textobj_clang_more_mappings = get(g:, 'textobj_clang_more_mappings', 0)
 let g:textobj_clang_include_headers = get(g:, 'textobj_clang_include_headers', 0)
 let s:spec = {}
 
-if g:textobj_clang_more_mapping
+if g:textobj_clang_more_mappings
     let g:textobj_clang_mapping_kinds = get(g:, 'textobj_clang_kinds', ['any', 'class', 'function', 'expression', 'statement', 'parameter', 'namespace', 'under_cursor', 'most_inner'])
     for s:name in g:textobj_clang_mapping_kinds
         let s:spec[s:name] = {