org.texi refers to org-iswitchb in emacs-26

[Robert Pluim]

That command was renamed to org-switchb in the upstream org-mode repo,
and the documentation was adjusted in
a1dfd4ff20c2a6caeef195fccbdae09a726d5b7a

I don't know if there's going to be another sync from org upstream to
emacs-26, if not something like the following is needed.

Robert

diff --git a/doc/misc/org.texi b/doc/misc/org.texi
index c6d603cd60..82348eff8f 100644
--- a/doc/misc/org.texi
+++ b/doc/misc/org.texi
@@ -952,7 +952,7 @@ Activation
 @findex org-agenda
 @findex org-capture
 @findex org-store-link
address@hidden org-iswitchb
address@hidden org-switchb
 
 Org mode buffers need font-lock to be turned on: this is the default in
 address@hidden you don't use font-lock globally, turn it on in Org buffer
@@ -962,7 +962,7 @@ Activation
 packages, please take the time to check the list (@pxref{Conflicts}).
 
 The four Org commands @command{org-store-link}, @command{org-capture},
address@hidden, and @command{org-iswitchb} should be accessible through
address@hidden, and @command{org-switchb} should be accessible through
 global keys (i.e., anywhere in Emacs, not just in Org buffers).  Here are
 suggested bindings for these keys, please modify the keys to your own
 liking.
@@ -970,7 +970,7 @@ Activation
 (global-set-key "\C-cl" 'org-store-link)
 (global-set-key "\C-ca" 'org-agenda)
 (global-set-key "\C-cc" 'org-capture)
-(global-set-key "\C-cb" 'org-iswitchb)
+(global-set-key "\C-cb" 'org-switchb)
 @end lisp
 
 @cindex Org mode, turning on
@@ -8024,7 +8024,7 @@ Agenda files
 @orgcmd{C-',org-cycle-agenda-files}
 @itemx C-,
 Cycle through agenda file list, visiting one file after the other.
address@hidden M-x org-iswitchb @key{RET}
address@hidden M-x org-switchb @key{RET}
 Command to use an @code{iswitchb}-like interface to switch to and between Org
 buffers.
 @end table