Fastfix for previous two commits (sorry) and chroma update.

Well, doing "git add ." not from repository's root is a bad idea.

Updated chroma dependency, added more languages to syntax highlighting.

vendor/github.com/alecthomas/chroma/lexers/n/nim.go

@@ -31,6 +31,7 @@ var Nim = internal.Register(MustNewLexer(
 			{`(v_?a_?r)\b`, KeywordDeclaration, nil},
 			{`(i_?n_?t_?|i_?n_?t_?8_?|i_?n_?t_?1_?6_?|i_?n_?t_?3_?2_?|i_?n_?t_?6_?4_?|f_?l_?o_?a_?t_?|f_?l_?o_?a_?t_?3_?2_?|f_?l_?o_?a_?t_?6_?4_?|b_?o_?o_?l_?|c_?h_?a_?r_?|r_?a_?n_?g_?e_?|a_?r_?r_?a_?y_?|s_?e_?q_?|s_?e_?t_?|s_?t_?r_?i_?n_?g_?)\b`, KeywordType, nil},
 			{`(n_?i_?l_?|t_?r_?u_?e_?|f_?a_?l_?s_?e_?)\b`, KeywordPseudo, nil},
+			{`\b_\b`, Name, nil}, // Standalone _ used as discardable variable identifier
 			{`\b((?![_\d])\w)(((?!_)\w)|(_(?!_)\w))*`, Name, nil},
 			{`[0-9][0-9_]*(?=([e.]|\'f(32|64)))`, LiteralNumberFloat, Push("float-suffix", "float-number")},
 			{`0x[a-f0-9][a-f0-9_]*`, LiteralNumberHex, Push("int-suffix")},