Follow changes in PR-css-fonts-3-20180814

This commit removes some functions taht differred to fonts-4.
See also: https://www.w3.org/TR/2018/PR-css-fonts-3-20180814/

Author: hail2u

after/syntax/css/fonts-3.vim

@@ -1,12 +1,10 @@
-syn keyword cssFontAttr contained unicase ordinal jis78 jis83 jis90 jis04 simplified traditional
+syn keyword cssFontAttr contained unicase jis78 jis83 jis90 jis04 simplified traditional ordinal
 syn match cssFontAttr contained "\<\(no-\)\=\(common\|discretionary\|historical\)-ligatures\>"
 syn match cssFontAttr contained "\<\(no-\)\=contextual\>"
-syn match cssFontAttr contained "\<historical-forms\>"
 syn match cssFontAttr contained "\<all-small-caps\>"
 syn match cssFontAttr contained "\<\(all-\)\=petite-caps\>"
 syn match cssFontAttr contained "\<titling-caps\>"
 syn match cssFontAttr contained "\<\(lining\|oldstyle\|proportional\|tabular\)-nums\>"
 syn match cssFontAttr contained "\<\(diagonal\|stacked\)-fractions\>"
-syn match cssFontAttr contained "\<slashed-zero\>"
 syn match cssFontAttr contained "\<proportional-width\>"
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
+syn match cssFontAttr contained "\<slashed-zero\>"

after/syntax/css/fonts-4.vim

@@ -8,4 +8,6 @@ syn match cssFontProp contained "\<base-palette\>"
 syn match cssFontProp contained "\<font-variant-emoji\>"
 syn keyword cssFontAttr contained emoji math fangsong infinity swap fallback optional light dark
 syn match cssFontAttr contained "\<system-ui\>"
+syn match cssFontAttr contained "\<historical-forms\>"
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
 syn match cssFontDescriptor "@font-palette-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

test/test.css

@@ -303,18 +303,12 @@
 .fonts-3 {
   display: common-ligatures;
   display: no-common-ligatures;
+  display: discretionary-ligatures;
   display: no-discretionary-ligatures;
   display: historical-ligatures;
   display: no-historical-ligatures;
   display: contextual;
   display: no-contextual;
-  display: stylistic(feature-value-name);
-  display: historical-forms;
-  display: styleset(feature-value-name #);
-  display: character-variant(feature-vlue-name #);
-  display: swash(feature-value-name);
-  display: ornaments(feature-value-name);
-  display: annotation(feature-value-name);
   display: all-small-caps;
   display: petite-caps;
   display: all-petite-caps;
@@ -326,16 +320,15 @@
   display: tabular-nums;
   display: diagonal-fractions;
   display: stacked-fractions;
-  display: ordinal;
-  display: slashed-zero;
   display: jis78;
   display: jis83;
   display: jis90;
   display: jis04;
   display: simplified;
   display: traditional;
   display: proportional-width;
-  display: discretionary-ligatures;
+  display: ordinal;
+  display: slashed-zero;
 }
 
 .fonts-4 {
@@ -347,11 +340,18 @@
   font-palette: auto;
   font-presentation: auto;
   font-variant-emoji: auto;
+  display: system-ui;
   display: emoji;
   display: math;
   display: fangsong;
-  display: system-ui;
   display: infinity;
+  display: stylistic(feature-value-name);
+  display: historical-forms;
+  display: styleset(feature-value-name #);
+  display: character-variant(feature-vlue-name #);
+  display: swash(feature-value-name);
+  display: ornaments(feature-value-name);
+  display: annotation(feature-value-name);
   display: swap;
   display: fallback;
   display: optional;