spec: update spacing to match gofmt, where reasonable.

R=gri, rsc
CC=golang-dev
https://golang.org/cl/5327053

doc/go_spec.html

@@ -974,7 +974,7 @@ BaseType = Type .
 
 <pre>
 *int
-*map[string] *chan int
+*map[string]*chan int
 </pre>
 
 <h3 id="Function_types">Function types</h3>
@@ -1153,9 +1153,9 @@ failure will cause a <a href="#Run_time_panics">run-time panic</a>.
 </p>
 
 <pre>
-map [string] int
-map [*T] struct { x, y float64 }
-map [string] interface {}
+map[string]int
+map[*T]struct{ x, y float64 }
+map[string]interface{}
 </pre>
 
 <p>
@@ -1174,8 +1174,8 @@ which takes the map type and an optional capacity hint as arguments:
 </p>
 
 <pre>
-make(map[string] int)
-make(map[string] int, 100)
+make(map[string]int)
+make(map[string]int, 100)
 </pre>
 
 <p>
@@ -1306,8 +1306,8 @@ Given the declarations
 type (
 	T0 []string
 	T1 []string
-	T2 struct { a, b int }
-	T3 struct { a, c int }
+	T2 struct{ a, b int }
+	T3 struct{ a, c int }
 	T4 func(int, float64) *T0
 	T5 func(x int, y float64) *[]string
 )
@@ -1320,7 +1320,7 @@ these types are identical:
 <pre>
 T0 and T0
 []int and []int
-struct { a, b *T5 } and struct { a, b *T5 }
+struct{ a, b *T5 } and struct{ a, b *T5 }
 func(x int, y float64) *[]string and func(int, float64) (result *[]string)
 </pre>
 
@@ -1639,7 +1639,7 @@ it is only incremented after each ConstSpec:
 
 <pre>
 const (
-	bit0, mask0 = 1 &lt;&lt; iota, 1 &lt;&lt; iota - 1  // bit0 == 1, mask0 == 0
+	bit0, mask0 = 1 &lt;&lt; iota, 1&lt;&lt;iota - 1  // bit0 == 1, mask0 == 0
 	bit1, mask1                           // bit1 == 2, mask1 == 1
 	_, _                                  // skips iota == 2
 	bit3, mask3                           // bit3 == 8, mask3 == 7
@@ -1670,7 +1670,7 @@ TypeSpec     = identifier Type .
 type IntArray [16]int
 
 type (
-	Point struct { x, y float64 }
+	Point struct{ x, y float64 }
 	Polar Point
 )
 
@@ -3517,7 +3517,7 @@ order.
 For example, in the assignment
 </p>
 <pre>
-y[f()], ok = g(h(), i() + x[j()], &lt;-c), k()
+y[f()], ok = g(h(), i()+x[j()], &lt;-c), k()
 </pre>
 <p>
 the function calls and communication happen in the order
@@ -4247,7 +4247,7 @@ for {  // send random sequence of bits to c
 	}
 }
 
-select { }  // block forever
+select {}  // block forever
 </pre>
 
 
@@ -4647,7 +4647,7 @@ is negative or larger than <code>m</code>, or if <code>n</code> or
 s := make([]int, 10, 100)       // slice with len(s) == 10, cap(s) == 100
 s := make([]int, 10)            // slice with len(s) == cap(s) == 10
 c := make(chan int, 10)         // channel with a buffer size of 10
-m := make(map[string] int, 100)  // map with initial space for 100 elements
+m := make(map[string]int, 100)  // map with initial space for 100 elements
 </pre>