Hi, could we allow Depend strings to contain tabs?

It is natural to want to use tabs when aligning dependencies in build.fan:

depends = [
    // ---- Fantom Core -----------------
    "sys          1.0.70 - 1.0",
    "concurrent   1.0.70 - 1.0",
    "web          1.0.70 - 1.0",
    "dom          1.0.70 - 1.0",
    "domkit       1.0.70 - 1.0",
]

I know a few people who, after updating their build.fan, have been scratching their heads thinking the ParseErr refers to the versioning part.

The following patch shows the change should be pretty minor:

diff -r 52185c6ba69c src/sys/java/fan/sys/Depend.java
--- a/src/sys/java/fan/sys/Depend.java	Mon Aug 05 12:19:22 2019 -0400
+++ b/src/sys/java/fan/sys/Depend.java	Tue Aug 06 19:45:04 2019 +0100
@@ -136,7 +136,7 @@
 
     private void consumeSpaces()
     {
-      while (cur == ' ') consume();
+      while (cur == ' ' || cur == '\t') consume();
     }

 
diff -r 52185c6ba69c src/sys/js/fan/Depend.js
--- a/src/sys/js/fan/Depend.js	Mon Aug 05 12:19:22 2019 -0400
+++ b/src/sys/js/fan/Depend.js	Tue Aug 06 19:45:04 2019 +0100
@@ -270,7 +270,7 @@
 
 fan.sys.DependParser.prototype.consumeSpaces = function()
 {
-  while (this.m_cur == 32) this.consume();
+  while (this.m_cur == 32 || this.m_cur == 9) this.consume();
 }

 
diff -r 52185c6ba69c src/testSys/fan/DependTest.fan
--- a/src/testSys/fan/DependTest.fan	Mon Aug 05 12:19:22 2019 -0400
+++ b/src/testSys/fan/DependTest.fan	Tue Aug 06 19:45:04 2019 +0100
@@ -107,6 +107,9 @@
     verifyErr(ParseErr#) { x := Depend.fromStr(" 8") }
     verifyErr(ParseErr#) { x := Depend.fromStr(" foo 0") }
     verifyErr(ParseErr#) { x := Depend.fromStr("foo\n1.8") }
+
+    d = Depend.fromStr("foo\t\t\t1.2")
+    verifyEq(d.toStr, "foo 1.2")
   }

I pushed that change