all: fix mismatched symbols

There are some symbol mismatches in the comments, this commit attempts to fix them

Change-Id: I5c9075e5218defe9233c075744d243b26ff68496
Reviewed-on: https://go-review.googlesource.com/c/go/+/492996
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: shuang cui <imcusg@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>

src/math/asinh.go

@@ -25,7 +25,7 @@ package math
 //	        asinh(x) = sign(x) * log [ |x| + sqrt(x*x+1) ]
 //	we have
 //	asinh(x) := x  if  1+x*x=1,
-//	         := sign(x)*(log(x)+ln2)) for large |x|, else
+//	         := sign(x)*(log(x)+ln2) for large |x|, else
 //	         := sign(x)*log(2|x|+1/(|x|+sqrt(x*x+1))) if|x|>2, else
 //	         := sign(x)*log1p(|x| + x**2/(1 + sqrt(1+x**2)))
 //

src/net/http/cookiejar/jar.go

@@ -465,7 +465,7 @@ func (j *Jar) domainAndType(host, domain string) (string, bool, error) {
 		// dot in the domain-attribute before processing the cookie.
 		//
 		// Most browsers don't do that for IP addresses, only curl
-		// version 7.54) and IE (version 11) do not reject a
+		// (version 7.54) and IE (version 11) do not reject a
 		//     Set-Cookie: a=1; domain=.127.0.0.1
 		// This leading dot is optional and serves only as hint for
 		// humans to indicate that a cookie with "domain=.bbc.co.uk"

src/runtime/exithook.go

@@ -37,7 +37,7 @@ var exitHooks struct {
 // runExitHooks runs any registered exit hook functions (funcs
 // previously registered using runtime.addExitHook). Here 'exitCode'
 // is the status code being passed to os.Exit, or zero if the program
-// is terminating normally without calling os.Exit).
+// is terminating normally without calling os.Exit.
 func runExitHooks(exitCode int) {
 	if exitHooks.runningExitHooks {
 		throw("internal error: exit hook invoked exit")

src/runtime/metrics.go

@@ -72,7 +72,7 @@ func initMetrics() {
 		// and exclusive lower bound (e.g. 48-byte size class is
 		// (32, 48]) whereas we want and inclusive lower-bound
 		// and exclusive upper-bound (e.g. 48-byte size class is
-		// [33, 49). We can achieve this by shifting all bucket
+		// [33, 49)). We can achieve this by shifting all bucket
 		// boundaries up by 1.
 		//
 		// Also, a float64 can precisely represent integers with