patch 7.4.1799
Problem:    'guicolors' is a confusing option name.
Solution:   Use 'termguicolors' instead. (Hirohito Higashi)
diff --git a/src/eval.c b/src/eval.c
index 7abb62b..b3a3b41 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -14042,15 +14042,15 @@
 	"tcl",
 # endif
 #endif
+#ifdef FEAT_TERMGUICOLORS
+	"termguicolors",
+#endif
 #ifdef TERMINFO
 	"terminfo",
 #endif
 #ifdef FEAT_TERMRESPONSE
 	"termresponse",
 #endif
-#ifdef FEAT_TERMTRUECOLOR
-	"termtruecolor",
-#endif
 #ifdef FEAT_TEXTOBJ
 	"textobjects",
 #endif
@@ -20019,7 +20019,7 @@
     }
     else
     {
-#if defined(FEAT_GUI) || defined(FEAT_TERMTRUECOLOR)
+#if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
 	if (USE_24BIT)
 	    modec = 'g';
 	else