docs: Fix about tmux pages

Author: tony

docs/about_tmux.md

@@ -33,7 +33,7 @@ the text dimension. Inside tmux you can:
 
 ### Text-based window manager
 
-```{eval_rst}
+```{eval-rst}
 =================== ====================== ===============================
 **tmux**            **"Desktop"-Speak**    **Plain English**
 ------------------- ---------------------- -------------------------------
@@ -303,7 +303,7 @@ $ tmux new-session [-s session-name]
 
 Sessions can be _renamed after creation_.
 
-```{eval_rst}
+```{eval-rst}
 =============== =========================================================
 Command         .. code-block:: bash
 
@@ -325,7 +325,7 @@ $ tmux new-window [-n window-name]
 
 Windows can be _renamed after creation_.
 
-```{eval_rst}
+```{eval-rst}
 =============== ==========================================================
 Command         .. code-block:: bash
 
@@ -337,7 +337,7 @@ Short cut       ``Prefix`` + ``,``
 
 ### Creating new windows
 
-```{eval_rst}
+```{eval-rst}
 =============== =========================================================
 Command         .. code-block:: bash
 
@@ -383,7 +383,7 @@ $ tmux last-window
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -418,7 +418,7 @@ $ tmux swap-window [-t dst-window]
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -434,7 +434,7 @@ $ tmux move-pane [-t dst-pane]
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -460,7 +460,7 @@ $ tmux next-window
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -488,7 +488,7 @@ $ tmux kill-window [-t target-window]
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -504,7 +504,7 @@ $ tmux kill-pane [-t target-pane]
 
 ```
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -522,7 +522,7 @@ $ tmux split-window [-c start-directory] <shell-command>
 
 Tmux windows can be split into multiple panes.
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------
@@ -610,7 +610,7 @@ set -g status-interval 1
 
 :::
 
-```{eval_rst}
+```{eval-rst}
 ===================   ====================================================
 Short cut             Action
 -------------------   ----------------------------------------------------