Use tabs as the canonical source indentation in git

Space conversion is done during generation only. Fixes #192

examples/waitgroups/waitgroups.go

@@ -4,39 +4,39 @@
 package main
 
 import (
-    "fmt"
-    "sync"
-    "time"
+	"fmt"
+	"sync"
+	"time"
 )
 
 // This is the function we'll run in every goroutine.
 // Note that a WaitGroup must be passed to functions by
 // pointer.
 func worker(id int, wg *sync.WaitGroup) {
-    fmt.Printf("Worker %d starting\n", id)
+	fmt.Printf("Worker %d starting\n", id)
 
-    // Sleep to simulate an expensive task.
-    time.Sleep(time.Second)
-    fmt.Printf("Worker %d done\n", id)
+	// Sleep to simulate an expensive task.
+	time.Sleep(time.Second)
+	fmt.Printf("Worker %d done\n", id)
 
-    // Notify the WaitGroup that this worker is done.
-    wg.Done()
+	// Notify the WaitGroup that this worker is done.
+	wg.Done()
 }
 
 func main() {
 
-    // This WaitGroup is used to wait for all the
-    // goroutines launched here to finish.
-    var wg sync.WaitGroup
+	// This WaitGroup is used to wait for all the
+	// goroutines launched here to finish.
+	var wg sync.WaitGroup
 
-    // Launch several goroutines and increment the WaitGroup
-    // counter for each.
-    for i := 1; i <= 5; i++ {
-        wg.Add(1)
-        go worker(i, &wg)
-    }
+	// Launch several goroutines and increment the WaitGroup
+	// counter for each.
+	for i := 1; i <= 5; i++ {
+		wg.Add(1)
+		go worker(i, &wg)
+	}
 
-    // Block until the WaitGroup counter goes back to 0;
-    // all the workers notified they're done.
-    wg.Wait()
+	// Block until the WaitGroup counter goes back to 0;
+	// all the workers notified they're done.
+	wg.Wait()
 }