fix: render a single tab without a tab bar

142 tab bars held one tab, most of them "On the device" under a heading saying so. One item now stands alone, led by its label unless it names the place the text around already gives. The network route drops "Run the command on the computer" under the heading "From your computer", which keeps RetroPie in its word budget.

scripts/generate_site.py

@@ -4202,7 +4202,7 @@ def _setup_routes(name: str, display: str, page_link: bool = False) -> list[str]
             # lines are on the get/ page, the one the command is shared from.
             tabs = ("windows",) if page_link else ("windows", "macos", "linux")
             computer += [
-                "Needs the device on your network. Run the command on the computer.",
+                "Needs the device on your network.",
                 "",
                 *terminal_tabs(tabs, args, how=how),
                 *([f"[Mac or Linux](../{get_page_link(name)}#from-your-computer)", ""]

scripts/siteguides.py

@@ -454,6 +454,10 @@ def fence(shell: str, command: str, indent: str = "") -> list[str]:
     return [f'{indent}```{shell} title="{FENCE_TITLES[shell]}"', f"{indent}{command}", f"{indent}```"]
 
 
+# Terminals named by where the command runs, not by the system it runs on.
+PLACES = ("device", "server")
+
+
 def terminal_tabs(
     tabs: tuple[str, ...], args: dict[str, str], indent: str = "", steps: bool = True,
     how: dict[str, str] | None = None,
@@ -465,6 +469,8 @@ def terminal_tabs(
     items = []
     for key in tabs:
         label, shared, shell = TERMINALS[key]
+        if len(tabs) == 1 and key in PLACES:
+            label = ""  # one place, which the text around already names
         text = (how or {}).get(key) or shared
         body = [text, ""] if steps else []
         items.append((label, body + fence(shell, install_command(shell, args.get(key, "")))))

scripts/sitemarkup.py

@@ -139,8 +139,17 @@ def details(kind: str, title: str, body: list[str], indent: str = "", opened: bo
 
 def tabs(items: list[tuple[str, list[str]]], indent: str = "", sync: str = "os") -> list[str]:
     """Content tabs. Tabs that share a label share the reader's choice
-    across pages."""
+    across pages.
+
+    One item is no choice: 142 bars offered a single tab, most of them
+    "On the device" under a heading that says so. Its body stands alone,
+    led by its label when it has one: the RetroPie card is read from Linux
+    only, and the label is where the page said so."""
     lines: list[str] = []
+    if len(items) == 1:
+        label, body = items[0]
+        lead = [f"{indent}**{label}**", ""] if label else []
+        return [*lead, *_indented(_trim(body), indent), ""]
     if _engine == "mkdocs":
         for label, body in items:
             lines += [f'{indent}=== "{label}"', "", *_indented(_trim(body), indent + "    "), ""]