rationalize some latex abbrevs (e.g. \upMu -> \Mu)

stdlib/REPL/src/latex_symbols.jl

@@ -984,17 +984,16 @@ const latex_symbols = Dict(
     "\\droang" => "̚",  # left angle above (non-spacing)
     "\\wideutilde" => "̰",  # under tilde accent (multiple characters and non-spacing)
     "\\not" => "̸",  # combining long solidus overlay
-    "\\upMu" => "Μ",  # capital mu, greek
-    "\\upNu" => "Ν",  # capital nu, greek
-    "\\upOmicron" => "Ο",  # capital omicron, greek
-    "\\upepsilon" => "ε",  # rounded small epsilon, greek
-    "\\upomicron" => "ο",  # small omicron, greek
-    "\\upvarbeta" => "ϐ",  # rounded small beta, greek
-    "\\upoldKoppa" => "Ϙ",  # greek letter archaic koppa
-    "\\upoldkoppa" => "ϙ",  # greek small letter archaic koppa
-    "\\upstigma" => "ϛ",  # greek small letter stigma
-    "\\upkoppa" => "ϟ",  # greek small letter koppa
-    "\\upsampi" => "ϡ",  # greek small letter sampi
+    "\\Mu" => "Μ",  # capital mu, greek
+    "\\Nu" => "Ν",  # capital nu, greek
+    "\\Omicron" => "Ο",  # capital omicron, greek
+    "\\omicron" => "ο",  # small omicron, greek
+    "\\varbeta" => "ϐ",  # rounded small beta, greek
+    "\\oldKoppa" => "Ϙ",  # greek letter archaic koppa
+    "\\oldkoppa" => "ϙ",  # greek small letter archaic koppa
+    "\\stigma" => "ϛ",  # greek small letter stigma
+    "\\koppa" => "ϟ",  # greek small letter koppa
+    "\\sampi" => "ϡ",  # greek small letter sampi
     "\\tieconcat" => "⁀",  # character tie, z notation sequence concatenation
     "\\leftharpoonaccent" => "⃐",  # combining left harpoon above
     "\\rightharpoonaccent" => "⃑",  # combining right harpoon above