After ‘arcto’ path command(a or A) flags, spaces are no longer removed by default (#1353)

Co-authored-by: 壹丝 <jie.lijie@alibaba-inc.com>

lib/svgo/tools.js

@@ -80,7 +80,8 @@ exports.cleanupOutData = function(data, params, command) {
         // no extra space in front of first number
         if (i == 0) delimiter = '';
 
-        // no extra space after 'arcto' command flags
+        // no extra space after 'arcto' command flags(large-arc and sweep flags)
+        // a20 60 45 0 1 30 20 → a20 60 45 0130 20
         if (params.noSpaceAfterFlags && (command == 'A' || command == 'a')) {
             var pos = i % 7;
             if (pos == 4 || pos == 5) delimiter = '';

plugins/convertPathData.js

@@ -23,8 +23,8 @@ exports.params = {
     utilizeAbsolute: true,
     leadingZero: true,
     negativeExtraSpace: true,
-    noSpaceAfterFlags: true,
-    forceAbsolutePath: false
+    noSpaceAfterFlags: false, // a20 60 45 0 1 30 20 → a20 60 45 0130 20
+    forceAbsolutePath: false,
 };
 
 var pathElems = require('./_collections.js').pathElems,

plugins/mergePaths.js

@@ -11,7 +11,7 @@ exports.params = {
     force: false,
     leadingZero: true,
     negativeExtraSpace: true,
-    noSpaceAfterFlags: true
+    noSpaceAfterFlags: false, // a20 60 45 0 1 30 20 → a20 60 45 0130 20
 };
 
 var path2js = require('./_path.js').path2js,

test/plugins/convertPathData.21.svg

@@ -0,0 +1,9 @@
+<svg viewBox="0 0 1200 400" xmlns="http://www.w3.org/2000/svg">
+    <path d="M300 200 h-150 a150 150 0 1 0 150 -150 z" fill="red" stroke="blue" stroke-width="5" />
+</svg>
+
+@@@
+
+<svg viewBox="0 0 1200 400" xmlns="http://www.w3.org/2000/svg">
+    <path d="M300 200H150A150 150 0 1 0 300 50z" fill="red" stroke="blue" stroke-width="5"/>
+</svg>