doc: rephrase g:srcery_inverse desc

Author: roosta

README.md

@@ -130,9 +130,12 @@ default: 1
 
 #### g:srcery_inverse
 
-Enable or disable inverse highlighting (foreground becomes background, vice
-versa) globally for theme, will fall back to other methods of highlighting when
-this is disabled
+Enable or disable inverse highlighting (foreground becomes background,
+vice versa). This is used for visual selection, search highlights and
+some other things.
+
+Srcery will fall back to other methods of highlighting if this is
+disabled.
 
 default: 1
 

doc/srcery.txt

@@ -165,9 +165,12 @@ g:srcery_undercurl
 							 *srcery-option-inverse*
 g:srcery_inverse
 
-	Enable or disable inverse highlighting (foreground becomes background, vice
-	versa) globally for theme, will fall back to other methods of highlighting when
-	this is disabled.
+	Enable or disable inverse highlighting (foreground becomes background,
+	vice versa). This is used for visual selection, search highlights and
+	some other things.
+	
+	Srcery will fall back to other methods of highlighting if this is
+	disabled.
 
 	Default: 1