--- a/GIFReader.st	Fri Nov 04 16:03:44 2016 +0100
+++ b/GIFReader.st	Fri Nov 04 16:05:46 2016 +0100
@@ -41,7 +41,7 @@
 documentation
 "
     this class provides methods for loading and saving GIF pictures.
-    It has been tested with some different GIF87a pictures, I dont
+    It has been tested with some different GIF87a pictures, I don't
     know, if it works with other GIF versions.
     GIF extension blocks are not handled.
 
@@ -58,20 +58,20 @@
       CompuServe Incorporated.
 
     Notice:
-	there has been some annoyance regarding a patent on the compression algorithm
-	used in gif. This patent is now obsolete. However, there is no warranty from
-	exept, regarding any legal problems, when using GIF.
-	We therefore highly recommend to use newer (and especially: royalty-free) formats,
-	such as PNG.
+        there has been some annoyance regarding a patent on the compression algorithm
+        used in gif. This patent is now obsolete. However, there is no warranty from
+        exept, regarding any legal problems, when using GIF.
+        We therefore highly recommend to use newer (and especially: royalty-free) formats,
+        such as PNG.
 
     [See also:]
-	Image Form Icon
-	BlitImageReader FaceReader JPEGReader PBMReader PCXReader
-	ST80FormReader SunRasterReader TargaReader TIFFReader WindowsIconReader
-	XBMReader XPMReader XWDReader
+        Image Form Icon
+        BlitImageReader FaceReader JPEGReader PBMReader PCXReader
+        ST80FormReader SunRasterReader TargaReader TIFFReader WindowsIconReader
+        XBMReader XPMReader XWDReader
 
     [author:]
-	Claus Gittinger
+        Claus Gittinger
 "
 !