bugfix: s/TrimRight/TrimSuffix for certain cases (#618)

Use `TrimSuffix` instead of `TrimRight` in cases where an exact suffix
string needs to be removed, not all occurrences of all characters in a
specified cutset.

Fixes: #507

Signed-off-by: Pranshu Srivastava <rexagod@gmail.com>

buddyinfo.go

@@ -58,8 +58,8 @@ func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
 			return nil, fmt.Errorf("%w: Invalid number of fields, found: %v", ErrFileParse, parts)
 		}
 
-		node := strings.TrimRight(parts[1], ",")
-		zone := strings.TrimRight(parts[3], ",")
+		node := strings.TrimSuffix(parts[1], ",")
+		zone := strings.TrimSuffix(parts[3], ",")
 		arraySize := len(parts[4:])
 
 		if bucketCount == -1 {

proc.go

@@ -137,7 +137,7 @@ func (p Proc) CmdLine() ([]string, error) {
 		return []string{}, nil
 	}
 
-	return strings.Split(string(bytes.TrimRight(data, string("\x00"))), string(byte(0))), nil
+	return strings.Split(string(bytes.TrimRight(data, "\x00")), "\x00"), nil
 }
 
 // Wchan returns the wchan (wait channel) of a process.

proc_smaps.go

@@ -127,7 +127,7 @@ func (s *ProcSMapsRollup) parseLine(line string) error {
 	}
 
 	v := strings.TrimSpace(kv[1])
-	v = strings.TrimRight(v, " kB")
+	v = strings.TrimSuffix(v, " kB")
 
 	vKBytes, err := strconv.ParseUint(v, 10, 64)
 	if err != nil {

sysfs/system_cpu.go

@@ -321,7 +321,7 @@ func parseCPURange(data []byte) ([]uint16, error) {
 
 	var cpusInt = []uint16{}
 
-	for _, cpu := range strings.Split(strings.TrimRight(string(data), "\n"), ",") {
+	for _, cpu := range strings.Split(strings.TrimSuffix(string(data), "\n"), ",") {
 		if cpu == "" {
 			continue
 		}