Fix syntax highlight inconsistencies in Go code

Function calls and format specifier are not printed correctly.
Usually people are using `faith/vim-go` to group these highlights.
We add the corresponding color the vim-go groups. Still there
are some groups that are not present/defined in vim-go. I've added
a comment there for future fix.

Signed-off-by: hoenirvili <[email protected]>

colors/nord.vim

@@ -278,9 +278,12 @@ call s:hi("Conditional", s:nord9_gui, "", s:nord9_term, "", "", "")
 call s:hi("Constant", s:nord4_gui, "", "NONE", "", "", "")
 call s:hi("Define", s:nord9_gui, "", s:nord9_term, "", "", "")
 call s:hi("Delimiter", s:nord6_gui, "", s:nord6_term, "", "", "")
+call s:hi("Semicolon", s:nord9_gui, "", s:nord9_term, "", "", "")
+call s:hi("QuotationsMarks", s:nord6_gui, "", s:nord6_term, "", "", "")
 call s:hi("Exception", s:nord9_gui, "", s:nord9_term, "", "", "")
 call s:hi("Float", s:nord15_gui, "", s:nord15_term, "", "", "")
 call s:hi("Function", s:nord8_gui, "", s:nord8_term, "", "", "")
+call s:hi("FormatSpecifier", s:nord13_gui, "", s:nord13_term, "", "", "")
 call s:hi("Identifier", s:nord4_gui, "", "NONE", "", "NONE", "")
 call s:hi("Include", s:nord9_gui, "", s:nord9_term, "", "", "")
 call s:hi("Keyword", s:nord9_gui, "", s:nord9_term, "", "", "")
@@ -397,8 +400,6 @@ hi! link diffRemoved DiffDelete
 
 call s:hi("gitconfigVariable", s:nord7_gui, "", s:nord7_term, "", "", "")
 
-call s:hi("goBuiltins", s:nord7_gui, "", s:nord7_term, "", "", "")
-hi! link goConstants Keyword
 
 call s:hi("helpBar", s:nord3_gui, "", s:nord3_term, "", "", "")
 call s:hi("helpHyperTextJump", s:nord8_gui, "", s:nord8_term, "", s:underline, "")
@@ -571,6 +572,23 @@ call s:hi("CocErrorSign" , s:nord11_gui, "", s:nord11_term, "", "", "")
 call s:hi("CocInfoSign" , s:nord8_gui, "", s:nord8_term, "", "", "")
 call s:hi("CocHintSign" , s:nord10_gui, "", s:nord10_term, "", "", "")
 
+" vim-go
+" > faith/vim-go
+call s:hi("goBuiltins", s:nord7_gui, "", s:nord7_term, "", "", "")
+hi! link goConstants Keyword
+hi! link goFunctionCall Function
+hi! link goFormatSpecifier FormatSpecifier
+hi! link goEscapeOctal FormatSpecifier
+hi! link goEscapeC FormatSpecifier
+hi! link goEscapeX FormatSpecifier
+hi! link goEscapeU FormatSpecifier
+hi! link goEscapeBigU FormatSpecifier
+hi! link goEscapeError FormatSpecifier
+" TODO: these are not exposed by vim-go so you need to add
+" these groups to vim-go
+" hi! link goSemicolon Semicolon
+" hi! link goQuotationsMarks QuotationsMarks
+
 " Nvim LSP
 " > neovim/nvim-lsp
 call s:hi("LSPDiagnosticsWarning", s:nord13_gui, "", s:nord13_term, "", "", "")