math: remove the leading F from Fabs etc.
The letter is a holdover from C and unnecessary in Go.
Gofix module included.
Fixes #2306.
R=golang-dev, gri, dsymonds
CC=golang-dev
https://golang.org/cl/5158043
diff --git a/src/pkg/math/abs.go b/src/pkg/math/abs.go
new file mode 100644
index 0000000..eb3e4c7
--- /dev/null
+++ b/src/pkg/math/abs.go
@@ -0,0 +1,21 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package math
+
+// Abs returns the absolute value of x.
+//
+// Special cases are:
+// Abs(+Inf) = +Inf
+// Abs(-Inf) = +Inf
+// Abs(NaN) = NaN
+func Abs(x float64) float64 {
+ switch {
+ case x < 0:
+ return -x
+ case x == 0:
+ return 0 // return correctly abs(-0)
+ }
+ return x
+}
