docs: flip remaining guides to low-to-high fingerings (v0.43.0 follow-up)

The v0.43.0 commit updated fretboard.rst and chords.rst but missed the
fingering/tab examples in quickstart, cookbook, and nashville-blues-tabs.
Update those Fingering reprs and fb.tab()/scale_diagram blocks to the new
low-to-high default, and fix the "Reading Tab Notation" prose (chord tab
now lists strings low-to-high; high_to_low=True restores the old layout).

Part.to_tab() examples are unchanged (orientation-agnostic, high-on-top).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/guide/cookbook.rst

@@ -111,19 +111,19 @@ Generate fingerings for guitar and ukulele with
 
    >>> fb = Fretboard.guitar()
    >>> fb.chord("C")
-   Fingering(e=0, B=1, G=0, D=2, A=3, E=x)
+   Fingering(E=x, A=3, D=2, G=0, B=1, e=0)
    >>> fb.chord("G")
-   Fingering(e=3, B=0, G=0, D=0, A=2, E=3)
+   Fingering(E=3, A=2, D=0, G=0, B=0, e=3)
    >>> fb.chord("Am")
-   Fingering(e=0, B=1, G=2, D=2, A=0, E=x)
+   Fingering(E=x, A=0, D=2, G=2, B=1, e=0)
    >>> fb.chord("D")
-   Fingering(e=2, B=3, G=2, D=0, A=x, E=x)
+   Fingering(E=x, A=x, D=0, G=2, B=3, e=2)
 
    >>> uke = Fretboard.ukulele()
    >>> uke.chord("C")
-   Fingering(A=3, E=0, C=0, G=0)
+   Fingering(G=0, C=0, E=0, A=3)
    >>> uke.chord("G")
-   Fingering(A=2, E=3, C=2, G=0)
+   Fingering(G=0, C=2, E=3, A=2)
 
 Explore an Interval
 -------------------

docs/guide/nashville-blues-tabs.rst

@@ -209,10 +209,10 @@ Visualize the blues scale on guitar to see the patterns:
    >>> print(fb.scale_diagram(blues, frets=12))
        0   1   2   3   4   5   6   7   8   9  10  11  12
    E| - | - | - | - | - | A | - | - | C | - | D | Eb| E |
-   B| - | - | - | D | Eb| E | - | - | - | - | A | - | - |
-   G| - | - | A | - | - | C | - | D | Eb| E | - | - | - |
-   D| - | - | - | - | A | - | - | C | - | D | Eb| E | - |
    A| A | - | - | C | - | D | Eb| E | - | - | - | - | A |
+   D| - | - | - | - | A | - | - | C | - | D | Eb| E | - |
+   G| - | - | A | - | - | C | - | D | Eb| E | - | - | - |
+   B| - | - | - | D | Eb| E | - | - | - | - | A | - | - |
    E| - | - | - | - | - | A | - | - | C | - | D | Eb| E |
 
 The minor pentatonic (same scale without the Eb) is the most-played
@@ -243,30 +243,30 @@ Get the tab for any chord on any instrument:
    >>> fb = Fretboard.guitar()
    >>> print(fb.tab("C"))
    C major
-   e|--0--
-   B|--1--
-   G|--0--
-   D|--2--
-   A|--3--
    E|--x--
+   A|--3--
+   D|--2--
+   G|--0--
+   B|--1--
+   e|--0--
 
    >>> print(fb.tab("Am"))
    A minor
-   e|--0--
-   B|--1--
-   G|--2--
-   D|--2--
-   A|--0--
    E|--x--
+   A|--0--
+   D|--2--
+   G|--2--
+   B|--1--
+   e|--0--
 
    >>> print(fb.tab("E7"))
    E dominant 7th
-   e|--0--
-   B|--0--
-   G|--1--
-   D|--0--
-   A|--2--
    E|--0--
+   A|--2--
+   D|--0--
+   G|--1--
+   B|--0--
+   e|--0--
 
 Works with any instrument:
 
@@ -275,24 +275,27 @@ Works with any instrument:
    >>> uke = Fretboard.ukulele()
    >>> print(uke.tab("C"))
    C major
-   A|--3--
-   E|--0--
-   C|--0--
    G|--0--
+   C|--0--
+   E|--0--
+   A|--3--
 
 Reading Tab Notation
 ~~~~~~~~~~~~~~~~~~~~~
 
 ::
 
-    e|--0--    ← open string (don't fret, just pluck)
-    B|--1--    ← press fret 1
-    G|--0--    ← open string
-    D|--2--    ← press fret 2
-    A|--3--    ← press fret 3
     E|--x--    ← muted (don't play this string)
+    A|--3--    ← press fret 3
+    D|--2--    ← press fret 2
+    G|--0--    ← open string
+    B|--1--    ← press fret 1
+    e|--0--    ← open string (don't fret, just pluck)
 
-- Each line is a string (highest pitch at top, lowest at bottom)
+- Each line is a string. Chord tab from ``fb.tab()`` lists strings
+  low-to-high (lowest pitch at top) by default since v0.43.0; pass
+  ``high_to_low=True`` to the fretboard for the traditional
+  highest-pitch-on-top layout.
 - Numbers are fret positions (0 = open, 1-24 = fretted)
 - ``x`` means the string is muted / not played
 - ``|`` marks measure boundaries in sequence tabs

docs/guide/quickstart.rst

@@ -130,7 +130,7 @@ Guitar fingerings:
 
    >>> fb = Fretboard.guitar()
    >>> fb.chord("Am")
-   Fingering(e=0, B=1, G=2, D=2, A=0, E=x)
+   Fingering(E=x, A=0, D=2, G=2, B=1, e=0)
 
 All of the above works without PortAudio, without sounddevice,
 without any audio setup at all. It's pure Python music theory.