diff --git a/src/gf.c b/src/gf.c
index 1cb8ec4cf324a..5d344f1815c03 100644
--- a/src/gf.c
+++ b/src/gf.c
@@ -1339,7 +1339,7 @@ jl_methlist_t *jl_method_list_insert(jl_methlist_t **pml, jl_tuple_t *type,
             }
             item = next;
             pitem = pnext;
-	    item_parent = next_parent;
+            item_parent = next_parent;
         }
     }
     JL_GC_POP();
diff --git a/src/support/MurmurHash3.c b/src/support/MurmurHash3.c
index 6dcde79304394..cbdd6b35d4def 100644
--- a/src/support/MurmurHash3.c
+++ b/src/support/MurmurHash3.c
@@ -16,20 +16,20 @@
 
 #if defined(_MSC_VER)
 
-#define FORCE_INLINE	__forceinline
+#define FORCE_INLINE    __forceinline
 
 #include <stdlib.h>
 
-#define ROTL32(x,y)	_rotl(x,y)
-#define ROTL64(x,y)	_rotl64(x,y)
+#define ROTL32(x,y)     _rotl(x,y)
+#define ROTL64(x,y)     _rotl64(x,y)
 
 #define BIG_CONSTANT(x) (x)
 
 // Other compilers
 
-#else	// defined(_MSC_VER)
+#else   // defined(_MSC_VER)
 
-#define	FORCE_INLINE inline __attribute__((always_inline))
+#define FORCE_INLINE inline __attribute__((always_inline))
 
 static inline uint32_t rotl32 ( uint32_t x, int8_t r )
 {
@@ -41,8 +41,8 @@ static inline uint64_t rotl64 ( uint64_t x, int8_t r )
   return (x << r) | (x >> (64 - r));
 }
 
-#define	ROTL32(x,y)	rotl32(x,y)
-#define ROTL64(x,y)	rotl64(x,y)
+#define ROTL32(x,y)     rotl32(x,y)
+#define ROTL64(x,y)     rotl64(x,y)
 
 #define BIG_CONSTANT(x) (x##LLU)
 
diff --git a/src/support/dtypes.h b/src/support/dtypes.h
index 9ccb64151dc46..86a8d7b325ca4 100644
--- a/src/support/dtypes.h
+++ b/src/support/dtypes.h
@@ -84,15 +84,15 @@
 #endif
 
 #ifdef _OS_WINDOWS_
-#define __LITTLE_ENDIAN	1234
-#define __BIG_ENDIAN	4321
-#define __PDP_ENDIAN	3412
+#define __LITTLE_ENDIAN    1234
+#define __BIG_ENDIAN       4321
+#define __PDP_ENDIAN       3412
 #define __BYTE_ORDER       __LITTLE_ENDIAN
 #define __FLOAT_WORD_ORDER __LITTLE_ENDIAN
-#define LITTLE_ENDIAN  __LITTLE_ENDIAN
-#define BIG_ENDIAN     __BIG_ENDIAN
-#define PDP_ENDIAN     __PDP_ENDIAN
-#define BYTE_ORDER     __BYTE_ORDER
+#define LITTLE_ENDIAN      __LITTLE_ENDIAN
+#define BIG_ENDIAN         __BIG_ENDIAN
+#define PDP_ENDIAN         __PDP_ENDIAN
+#define BYTE_ORDER         __BYTE_ORDER
 #endif
 
 #if (__STDC_VERSION__ >= 199901L) || defined(__GNUG__)
diff --git a/src/support/wcwidth.c b/src/support/wcwidth.c
index 2137eccc1a8c8..c74a28967f10e 100644
--- a/src/support/wcwidth.c
+++ b/src/support/wcwidth.c
@@ -192,7 +192,7 @@ DLLEXPORT int wcwidth(uint32_t ucs)
 
   /* binary search in table of non-spacing characters */
   if (bisearch(ucs, combining,
-	       sizeof(combining) / sizeof(struct interval) - 1))
+               sizeof(combining) / sizeof(struct interval) - 1))
     return 0;
 
   /* if we arrive here, ucs is not a combining or C0/C1 control character */
@@ -298,7 +298,7 @@ int wcwidth_cjk(uint32_t ucs)
 
   /* binary search in table of non-spacing characters */
   if (bisearch(ucs, ambiguous,
-	       sizeof(ambiguous) / sizeof(struct interval) - 1))
+               sizeof(ambiguous) / sizeof(struct interval) - 1))
     return 2;
 
   return wcwidth(ucs);
diff --git a/test/functional.jl b/test/functional.jl
index 4f94914d1ba15..ef0fa6d7e8ee8 100644
--- a/test/functional.jl
+++ b/test/functional.jl
@@ -70,9 +70,9 @@ end
 
 let i = 0
     for j = countfrom(0, 2)
-	@test j == i*2
-	i += 1
-	i <= 10 || break
+        @test j == i*2
+        i += 1
+        i <= 10 || break
     end
 end
 
@@ -83,16 +83,16 @@ let t = take(0:2:8, 10), i = 0
     @test length(collect(t)) == 5
 
     for j = t
-	@test j == i*2
-	i += 1
+        @test j == i*2
+        i += 1
     end
     @test i == 5
 end
 
 let i = 0
     for j = take(0:2:100, 10)
-	@test j == i*2
-	i += 1
+        @test j == i*2
+        i += 1
     end
     @test i == 10
 end
@@ -102,8 +102,8 @@ end
 
 let i = 0
     for j = drop(0:2:10, 2)
-	@test j == (i+2)*2
-	i += 1
+        @test j == (i+2)*2
+        i += 1
     end
     @test i == 4
 end
@@ -113,9 +113,9 @@ end
 
 let i = 0
     for j = cycle(0:3)
-	@test j == i % 4
-	i += 1
-	i <= 10 || break
+        @test j == i % 4
+        i += 1
+        i <= 10 || break
     end
 end
 
@@ -124,15 +124,15 @@ end
 
 let i = 0
     for j = repeated(1, 10)
-	@test j == 1
-	i += 1
+        @test j == 1
+        i += 1
     end
     @test i == 10
 end
 let i = 0
     for j = repeated(1)
-	@test j == 1
-	i += 1
-	i <= 10 || break
+        @test j == 1
+        i += 1
+        i <= 10 || break
     end
 end