capture both letters and numbers for preserveCaps for #295
capture both letters and numbers for preserveCaps for #295

davepwsmith/zotero-better-bibtex,davepwsmith/zotero-better-bibtex,egh/zotero-better-bibtex,egh/zotero-better-bibtex,maxxk/zotero-better-bibtex,gracile-fr/zotero-better-bibtex,maxxk/zotero-better-bibtex,maxxk/zotero-better-bibtex,egh/zotero-better-bibtex,egh/zotero-better-bibtex,gracile-fr/zotero-better-bibtex