diff --git a/base/abstractarray.jl b/base/abstractarray.jl
index fbf860299bee9..a663a5eab9d03 100644
--- a/base/abstractarray.jl
+++ b/base/abstractarray.jl
@@ -941,7 +941,7 @@ end
 function ipermutedims(A::AbstractArray,perm)
     iperm = Array(Int,length(perm))
     for i = 1:length(perm)
-	iperm[perm[i]] = i
+        iperm[perm[i]] = i
     end
     return permutedims(A,iperm)
 end
diff --git a/base/inference.jl b/base/inference.jl
index 834d9d0d94799..c2f25b7ad78fb 100644
--- a/base/inference.jl
+++ b/base/inference.jl
@@ -1346,7 +1346,7 @@ function typeinf(linfo::LambdaStaticData,atypes::Tuple,sparams::Tuple, def, cop)
     if la > 0
         lastarg = ast.args[1][la]
         if is_rest_arg(lastarg)
-	    if atypes === Tuple
+            if atypes === Tuple
                 if la > 1
                     atypes = tuple(NTuple{la-1,Any}..., Tuple[1])
                 end
diff --git a/base/linalg/arpack.jl b/base/linalg/arpack.jl
index 6bdfd1dcfa947..1e60e4274a6a0 100644
--- a/base/linalg/arpack.jl
+++ b/base/linalg/arpack.jl
@@ -20,11 +20,11 @@ function aupd_wrapper(T, matvecA::Function, matvecB::Function, solveSI::Function
     rwork  = cmplx ? Array(TR, ncv) : Array(TR, 0)
 
     if isempty(v0)
-    	resid  = Array(T, n)
-    	info   = zeros(BlasInt, 1)
+        resid  = Array(T, n)
+        info   = zeros(BlasInt, 1)
     else
-	resid  = deepcopy(v0)
-    	info   = ones(BlasInt, 1)
+        resid  = deepcopy(v0)
+        info   = ones(BlasInt, 1)
     end
     iparam = zeros(BlasInt, 11)
     ipntr  = zeros(BlasInt, (sym && !cmplx) ? 11 : 14)
diff --git a/base/linalg/dense.jl b/base/linalg/dense.jl
index c8ef8f11860c0..0960c65468f3a 100644
--- a/base/linalg/dense.jl
+++ b/base/linalg/dense.jl
@@ -269,7 +269,7 @@ function expm!{T<:BlasFloat}(A::StridedMatrix{T})
         end
     end
 
-	# Undo the balancing
+    # Undo the balancing
     for j = ilo:ihi
         scj = scale[j]
         for i = 1:n
diff --git a/base/linalg/ldlt.jl b/base/linalg/ldlt.jl
index 117f4a034bee2..2d5016c82bd2f 100644
--- a/base/linalg/ldlt.jl
+++ b/base/linalg/ldlt.jl
@@ -14,44 +14,44 @@ convert{T,S,U}(::Type{Factorization{T}}, F::LDLt{S,U}) = convert(LDLt{T,U}, F)
 
 # SymTridiagonal
 function ldltfact!{T<:Real}(S::SymTridiagonal{T})
-	n = size(S,1)
-	d = S.dv
-	e = S.ev
-	@inbounds for i = 1:n-1
-		e[i] /= d[i]
-		d[i+1] -= abs2(e[i])*d[i]
-		d[i+1] > 0 || throw(PosDefException(i+1))
-	end
-	return LDLt{T,SymTridiagonal{T}}(S)
+    n = size(S,1)
+    d = S.dv
+    e = S.ev
+    @inbounds for i = 1:n-1
+        e[i] /= d[i]
+        d[i+1] -= abs2(e[i])*d[i]
+        d[i+1] > 0 || throw(PosDefException(i+1))
+    end
+    return LDLt{T,SymTridiagonal{T}}(S)
 end
 function ldltfact{T}(M::SymTridiagonal{T})
-	S = typeof(zero(T)/one(T))
-	return S == T ? ldltfact!(copy(M)) : ldltfact!(convert(SymTridiagonal{S}, M))
+    S = typeof(zero(T)/one(T))
+    return S == T ? ldltfact!(copy(M)) : ldltfact!(convert(SymTridiagonal{S}, M))
 end
 function A_ldiv_B!{T}(S::LDLt{T,SymTridiagonal{T}}, B::AbstractVecOrMat{T})
-	n, nrhs = size(B, 1), size(B, 2)
-	size(S,1) == n || throw(DimensionMismatch(""))
-	d = S.data.dv
-	l = S.data.ev
-	@inbounds begin
-		for i = 2:n
-			li1 = l[i-1]
-			for j = 1:nrhs
-				B[i,j] -= li1*B[i-1,j]
-			end
-		end
-		dn = d[n]
-		for j = 1:nrhs
-			B[n,j] /= dn
-		end
-		for i = n-1:-1:1
-			di = d[i]
-			li = l[i]
-			for j = 1:nrhs
-				B[i,j] /= di
-				B[i,j] -= li*B[i+1,j]
-			end
-		end
-	end
-	return B
+    n, nrhs = size(B, 1), size(B, 2)
+    size(S,1) == n || throw(DimensionMismatch(""))
+    d = S.data.dv
+    l = S.data.ev
+    @inbounds begin
+        for i = 2:n
+            li1 = l[i-1]
+            for j = 1:nrhs
+                B[i,j] -= li1*B[i-1,j]
+            end
+        end
+        dn = d[n]
+        for j = 1:nrhs
+            B[n,j] /= dn
+        end
+        for i = n-1:-1:1
+            di = d[i]
+            li = l[i]
+            for j = 1:nrhs
+                B[i,j] /= di
+                B[i,j] -= li*B[i+1,j]
+            end
+        end
+    end
+    return B
 end
diff --git a/base/pkg.jl b/base/pkg.jl
index e53c0aff261ca..7bef424bbbb07 100644
--- a/base/pkg.jl
+++ b/base/pkg.jl
@@ -50,7 +50,7 @@ tag(pkg::String, sym::Symbol, commit::String) = cd(Entry.tag,pkg,sym,false,commi
 
 tag(pkg::String, ver::VersionNumber; force::Bool=false) = cd(Entry.tag,pkg,ver,force)
 tag(pkg::String, ver::VersionNumber, commit::String; force::Bool=false) =
-	cd(Entry.tag,pkg,ver,force,commit)
+    cd(Entry.tag,pkg,ver,force,commit)
 
 submit(pkg::String) = cd(Entry.submit,pkg)
 submit(pkg::String, commit::String) = cd(Entry.submit,pkg,commit)
@@ -61,7 +61,7 @@ build() = cd(Entry.build)
 build(pkgs::String...) = cd(Entry.build,[pkgs...])
 
 generate(pkg::String, license::String; force::Bool=false, authors::Union(String,Array) = [], config::Dict=Dict()) =
-	cd(Generate.package,pkg,license,force=force,authors=authors,config=config)
+    cd(Generate.package,pkg,license,force=force,authors=authors,config=config)
 
 
 test(;coverage::Bool=false) = cd(Entry.test; coverage=coverage)
diff --git a/base/pkg/cache.jl b/base/pkg/cache.jl
index b0d7bc4d4e9c1..23d0c44a9a327 100644
--- a/base/pkg/cache.jl
+++ b/base/pkg/cache.jl
@@ -40,9 +40,9 @@ function prefetch{S<:String}(pkg::String, url::String, sha1s::Vector{S})
     Git.set_remote_url(url, dir=cache)
     if !all(sha1->Git.iscommit(sha1, dir=cache), sha1s)
         info("Updating cache of $pkg...")
-	    Git.success(`remote update`, dir=cache) ||
-            error("couldn't update $cache using `git remote update`")
-	end
+        Git.success(`remote update`, dir=cache) ||
+        error("couldn't update $cache using `git remote update`")
+    end
     filter(sha1->!Git.iscommit(sha1, dir=cache), sha1s)
 end
 prefetch(pkg::String, url::String, sha1::String...) = prefetch(pkg, url, String[sha1...])
diff --git a/base/socket.jl b/base/socket.jl
index 18059a5f5429b..515e057b9e2eb 100644
--- a/base/socket.jl
+++ b/base/socket.jl
@@ -666,7 +666,7 @@ function listenany(default_port)
             return (addr.port,sock)
         end
         close(sock)
-	addr.port += 1
+        addr.port += 1
         if addr.port==default_port
             error("no ports available")
         end