Update README formatting

README.md

@@ -1,31 +1,36 @@
-## gotrace
-### tracing for go programs
+# gotrace
 
-gotrace annotates function calls in go source files with log statements on entry and exit.
+## Tracing for go programs
 
-	usage: gotrace [flags] [path ...]
-	-exclude string
-		exclude any matching functions, takes precedence over filter
-	-exported
-		only annotate exported functions
-	-filter string
-		only annotate functions matching the regular expression (default ".")
-	-formatLength int
-		limit the formatted length of each argument to 'size' (default 1024)
-	-package
-		show package name prefix on function calls
-	-prefix string
-		log prefix
-	-returns
-		show function return
-	-timing
-		print function durations. Implies -returns
-	-w	re-write files in place
+**gotrace** annotates function calls in go source files with log statements on entry and exit.
 
-#### Example
+```
+usage: gotrace [flags] [path ...]
+-exclude string
+	exclude any matching functions, takes precedence over filter
+-exported
+	only annotate exported functions
+-filter string
+	only annotate functions matching the regular expression (default ".")
+-formatLength int
+	limit the formatted length of each argument to 'size' (default 1024)
+-package
+	show package name prefix on function calls
+-prefix string
+	log prefix
+-returns
+	show function return
+-timing
+	print function durations. Implies -returns
+-w	re-write files in place
+```
 
+### Example
+
+```sh
     # gotrace operates directly on go source files.
     # Insert gotrace logging statements into all *.go files in the current directory
 	# Make sure all files are saved in version control, as this rewrites them in-place!
 
     $ gotrace -w -returns ./*.go
+```