Fix a few small typos.

@@ -39,7 +39,7 @@ func main() {
 
     // Here we'll just dump out the parsed options and
     // any trailing positional arguments. Note that we
-    // need to dereference the points with e.g. `*wordPtr`
+    // need to dereference the pointers with e.g. `*wordPtr`
     // to get the actual option values.
     fmt.Println("word:", *wordPtr)
     fmt.Println("numb:", *numbPtr)

@@ -1,5 +1,5 @@
 # Running the program shows that we pick up the value
-# value for `FOO` that we set in the program, but that
+# for `FOO` that we set in the program, but that
 # `BAR` is empty.
 $ go run environment-variables.go
 FOO: 1

@@ -36,7 +36,7 @@ func main() {
     // environment.
     env := os.Environ()
 
-    // Here's the actual `os.Exec` call. If this call is
+    // Here's the actual `syscall.Exec` call. If this call is
     // successful, the execution of our process will end
     // here and be replaced by the `/bin/ls -a -l -h`
     // process. If there is an error we'll get a return

@@ -32,4 +32,4 @@ func main() {
 }
 
 // Note that you don't need parentheses around conditions
-// in Go, but that the brackets are required.
+// in Go, but that the braces are required.

@@ -26,7 +26,7 @@ func main() {
     // This finds the match for the regexp.
     fmt.Println(r.FindString("peach punch"))
 
-    // The also finds the first match but returns the
+    // This also finds the first match but returns the
     // start and end indexes for the match instead of the
     // matching text.
     fmt.Println(r.FindStringIndex("peach punch"))

@@ -63,7 +63,7 @@ func main() {
     // To double-quote strings as in Go source, use `%q`.
     fmt.Printf("%q\n", "\"string\"")
 
-    // As with integers as seen earlier, `%x` renders
+    // As with integers seen earlier, `%x` renders
     // the string in base-16, with two output characters
     // per byte of input.
     fmt.Printf("%x\n", "hex this")

@@ -21,7 +21,7 @@ func main() {
         "2012-11-01T22:08:41+00:00")
     p(t1)
 
-    // `Format` and `Parse` uses example-based layouts. Usually
+    // `Format` and `Parse` use example-based layouts. Usually
     // you'll use a constant from `time` for these layouts, but
     // you can also supply custom layouts. Layouts must use the
     // reference time `Mon Jan 2 15:04:05 MST 2006` to show the