[gtk/matthiasc/for-master] Cosmetics: Tweak css parser error messages

[Matthias Clasen <matthiasc src gnome org>]

commit 4e1ea58503a6895029c95f56299e83ad91b606ab
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 7 18:16:19 2021 -0400

    Cosmetics: Tweak css parser error messages
    
    These show up in tooltips, so they should a) be capitalized
    and b) not end with a period.

 gtk/gtkcssdimensionvalue.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkcssdimensionvalue.c b/gtk/gtkcssdimensionvalue.c
index 385661b029..84a1d0e780 100644
--- a/gtk/gtkcssdimensionvalue.c
+++ b/gtk/gtkcssdimensionvalue.c
@@ -106,7 +106,7 @@ gtk_css_dimension_value_parse (GtkCssParser           *parser,
 
       if (i >= G_N_ELEMENTS (units))
         {
-          gtk_css_parser_error_syntax (parser, "'%s' is not a valid unit.", token->dimension.dimension);
+          gtk_css_parser_error_syntax (parser, "'%s' is not a valid unit", token->dimension.dimension);
           return NULL;
         }
 
@@ -122,7 +122,7 @@ gtk_css_dimension_value_parse (GtkCssParser           *parser,
   if (flags & GTK_CSS_POSITIVE_ONLY &&
       number < 0)
     {
-      gtk_css_parser_error_value (parser, "negative values are not allowed.");
+      gtk_css_parser_error_value (parser, "Negative values are not allowed");
       return NULL;
     }