diff --git a/doc.go b/doc.go
index d681707..96e4417 100644
--- a/doc.go
+++ b/doc.go
@@ -174,6 +174,9 @@ The following additional keybindings are provided by default:
     map sn :set sortby natural; set info
     map ss :set sortby size; set info size
     map st :set sortby time; set info time
+    map sa :set sortby atime; set info atime
+    map sc :set sortby ctime; set info ctime
+    map se :set sortby ext; set info
     map gh cd ~
 
 The following keybindings to applications are provided by default:
diff --git a/docstring.go b/docstring.go
index 438b31f..374e8c9 100644
--- a/docstring.go
+++ b/docstring.go
@@ -128,15 +128,15 @@ The following options can be used to customize the behavior of lf:
     tabstop         integer  (default 8)
     errorfmt        string   (default "\033[7;31;47m%s\033[0m")
     filesep         string   (default "\n")
-    ifs             string   (default ”) (not exported if empty)
-    previewer       string   (default ”) (not filtered if empty)
+    ifs             string   (default '') (not exported if empty)
+    previewer       string   (default '') (not filtered if empty)
     promptfmt       string   (default "\033[32;1m%u@%h\033[0m:\033[34;1m%w/\033[0m\033[1m%f\033[0m")
     shell           string   (default 'sh')
     sortby          string   (default 'natural')
     timefmt         string   (default 'Mon Jan _2 15:04:05 2006')
     ratios          string   (default '1:2:3')
-    info            string   (default ”)
-    shellopts       string   (default ”)
+    info            string   (default '')
+    shellopts       string   (default '')
 
 The following variables are exported for shell commands:
 
@@ -179,7 +179,7 @@ The following additional keybindings are provided by default:
     map st :set sortby time; set info time
     map sa :set sortby atime; set info atime
     map sc :set sortby ctime; set info ctime
-	map se :set sortby ext; set info
+    map se :set sortby ext; set info
     map gh cd ~
 
 The following keybindings to applications are provided by default:
diff --git a/lf.1 b/lf.1
index 62ddfcb..3553cbd 100644
--- a/lf.1
+++ b/lf.1
@@ -140,15 +140,15 @@ The following options can be used to customize the behavior of lf:
     tabstop         integer  (default 8)
     errorfmt        string   (default "\e033[7;31;47m%s\e033[0m")
     filesep         string   (default "\en")
-    ifs             string   (default ”) (not exported if empty)
-    previewer       string   (default ”) (not filtered if empty)
+    ifs             string   (default '') (not exported if empty)
+    previewer       string   (default '') (not filtered if empty)
     promptfmt       string   (default "\e033[32;1m%u@%h\e033[0m:\e033[34;1m%w/\e033[0m\e033[1m%f\e033[0m")
     shell           string   (default 'sh')
     sortby          string   (default 'natural')
     timefmt         string   (default 'Mon Jan _2 15:04:05 2006')
     ratios          string   (default '1:2:3')
-    info            string   (default ”)
-    shellopts       string   (default ”)
+    info            string   (default '')
+    shellopts       string   (default '')
 .EE
 .PP
 The following variables are exported for shell commands:
@@ -197,6 +197,9 @@ The following additional keybindings are provided by default:
     map sn :set sortby natural; set info
     map ss :set sortby size; set info size
     map st :set sortby time; set info time
+    map sa :set sortby atime; set info atime
+    map sc :set sortby ctime; set info ctime
+    map se :set sortby ext; set info
     map gh cd ~
 .EE
 .PP